Jon:
I have tackled lots of "projects" and this is one I let the shop do on my Targa. They had the "on the car" tool and the bill wasn't outrageous. Once we got in there, they discovered the hub was worn out (to many wheel bearing changes or the PO hacked it up) and I had to buy a new one. Somewhere over $300 if I remember correctly. I probably would have noticed how easily the worn out hub slid into the bearing but what if I didn't? Peace of mind for me. Front wheel bearings no problem. Front and rear on my BMW, etc... not a problem. I took a pass on this one.
Another thought: If you do want to get the "on the car" tool and it works for all 911s then maybe a Dorki group tool buy? I'd kick in some $.
My $0.02 worth.
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